KR20050095246A - Capacity changeable apparatus for scroll compressor - Google Patents
Capacity changeable apparatus for scroll compressor Download PDFInfo
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- KR20050095246A KR20050095246A KR1020040020502A KR20040020502A KR20050095246A KR 20050095246 A KR20050095246 A KR 20050095246A KR 1020040020502 A KR1020040020502 A KR 1020040020502A KR 20040020502 A KR20040020502 A KR 20040020502A KR 20050095246 A KR20050095246 A KR 20050095246A
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- scroll
- bypass
- bypass hole
- compression
- hole
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
- F04C18/02—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents
- F04C18/0207—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents both members having co-operating elements in spiral form
- F04C18/0215—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents both members having co-operating elements in spiral form where only one member is moving
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C28/00—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids
- F04C28/18—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids characterised by varying the volume of the working chamber
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
- F04C29/12—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F1/00—Springs
- F16F1/02—Springs made of steel or other material having low internal friction; Wound, torsion, leaf, cup, ring or the like springs, the material of the spring not being relevant
- F16F1/04—Wound springs
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2210/00—Fluid
- F04C2210/22—Fluid gaseous, i.e. compressible
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2210/00—Fluid
- F04C2210/26—Refrigerants with particular properties, e.g. HFC-134a
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2240/00—Components
- F04C2240/40—Electric motor
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S415/00—Rotary kinetic fluid motors or pumps
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S417/00—Pumps
Abstract
본 발명은 스크롤 압축기의 용량 가변 장치에 관한 것으로, 본 발명은 구동모터의 회전자에 회전축으로 편심 결합하여 선회운동을 하는 선회스크롤과, 선회스크롤의 랩과 맞물려 연속으로 이동하는 압축실을 형성하도록 랩을 구비하고 흡입압축실에 연통하는 제1 바이패스구멍과 중간압축실에 연통하는 제2 바이패스구멍을 형성하며 제1 바이패스구멍과 제2 바이패스구멍을 서로 연통하도록 밸브구멍을 형성하는 고정스크롤과, 고정스크롤의 밸브구멍에 설치하여 상기한 제1 바이패스구멍과 제2 바이패스구멍을 선택적으로 연통시켜 압축시점을 가변하는 바이패스조절수단을 포함함으로써, 선회스크롤의 회전수를 가변하거나 배관을 복잡하게 연결하지 않고도 압축가스의 토출량을 줄일 수 있어 저렴하면서도 신속하게 저용량 가변형의 스크롤 압축기를 구현할 수 있다.The present invention relates to a variable capacity device of a scroll compressor, the present invention is to form a rotating scroll and the compression chamber that is continuously engaged in engagement with the lap of the rotating scroll eccentrically coupled to the rotor of the drive motor by the rotating shaft. A valve having a wrap and forming a first bypass hole communicating with the suction compression chamber and a second bypass hole communicating with the intermediate compression chamber, and forming a valve hole so as to communicate the first bypass hole and the second bypass hole with each other. And a bypass adjusting means provided in the fixed scroll and the valve hole of the fixed scroll to selectively communicate the first bypass hole and the second bypass hole so as to vary the compression point, thereby changing the rotational speed of the turning scroll. Low-volume variable scroll compression inexpensively and quickly because the discharge volume of compressed gas can be reduced without complicated or complicated pipe connection A it can be implemented.
Description
본 발명은 스크롤 압축기의 용량 가변 장치에 관한 것으로, 특히 저용량으로의 용량 가변이 가능한 스크롤 압축기의 용량 가변 장치에 관한 것이다.The present invention relates to a variable capacity device of a scroll compressor, and more particularly to a variable capacity device of a scroll compressor capable of variable capacity to a low capacity.
일반적으로 압축기는 기계적 에너지를 압축성 유체의 압축에너지로 변환시키는 것으로, 통상 왕복동식 및 스크롤식 및 원심식 그리고 베인식으로 구분할 수 있다. 스크롤식 압축기는 피스톤의 직선운동을 이용하는 왕복동식과는 달리 원심식이나 베인식과 같이 회전체를 이용하여 가스를 흡입 압축하여 토출하는 방식이다. Generally, a compressor converts mechanical energy into compressive energy of a compressive fluid, and is generally classified into reciprocating type, scroll type, centrifugal type, and vane type. Unlike the reciprocating type which uses the linear motion of the piston, the scroll compressor is a method of sucking and compressing the gas by using a rotating body such as a centrifugal type or a vane type.
이러한 스크롤 압축기는 대부분 에어콘과 같은 공기조화기에 적용하는데, 최근 에어콘의 다기능화에 부응하여 스크롤 압축기도 용량을 가변할 수 있는 제품을 요구하는 추세이다. 이를 위해 압축기의 회전수를 제어하여 압축기 용량을 가변하는 방식이 주로 알려져 있으나 이는 복잡한 제어기(controller)를 구비하여야 하므로 제품가격이 상승하는 요인이 되었던 바 저렴하면서도 안정성이 있는 용량 가변 장치를 제공할 필요가 있다. 본 발명은 이에 대한 것이다.Most of these scroll compressors are applied to an air conditioner such as an air conditioner. In order to meet the multi-functionality of the air conditioner, the scroll compressor is also in demand for a product that can vary in capacity. To this end, a method of varying the compressor capacity by controlling the number of revolutions of the compressor is mainly known. However, since a complicated controller must be provided, it is a factor that increases the product price. Therefore, it is necessary to provide an inexpensive and stable capacity variable device. There is. The present invention is directed to this.
도 1은 종래 스크롤 압축기의 일례를 보인 종단면도이다. 1 is a longitudinal sectional view showing an example of a conventional scroll compressor.
이에 도시한 바와 같이 종래의 스크롤 압축기는, 가스흡입관(SP)과 가스토출관(DP)을 구비한 케이싱(1)과, 케이싱(1)의 내주면 상하 양측에 각각 고정하는 메인프레임(2) 및 서브프레임(미도시)과, 메인프레임(2)과 서브프레임(미도시) 사이에 장착하는 구동모터(3)와, 구동모터(3)의 중심에 압입하고 메인프레임(2)을 관통하여 구동모터(3)의 회전력을 전달하는 구동축(4)과, 구동축(4)에 결합하여 메인프레임(2)의 상면에 얹히는 선회스크롤(5)과, 선회스크롤(5)에 결합하여 복수 개의 압축실(P)을 형성하도록 메인프레임(2)의 상면에 고정하는 고정스크롤(6)과, 고정스크롤(6)의 배면에 결합하여 토출가스의 토출소음을 상쇄함과 아울러 케이싱(1)의 내부를 흡입공간(S1)과 토출공간(S2)으로 구획하는 토출커버(7)와, 고정스크롤(6)의 경판부 배면에 결합하여 토출한 가스의 역류를 방지하는 역지밸브 조립체(8)를 포함하고 있다.As shown in the drawing, a conventional scroll compressor includes a casing 1 having a gas suction pipe SP and a gas discharge pipe DP, a main frame 2 fixed to upper and lower sides of the inner circumferential surface of the casing 1, and A sub-frame (not shown), a drive motor 3 mounted between the main frame 2 and a sub-frame (not shown), and a driving motor 3 inserted into the center of the drive motor 3 and driven through the main frame 2 Drive shaft (4) for transmitting the rotational force of the motor (3), the turning scroll (5) coupled to the drive shaft (4) on the upper surface of the main frame (2), coupled to the turning scroll (5) a plurality of compression The fixed scroll 6 fixed to the upper surface of the main frame 2 to form the seal P, and coupled to the rear surface of the fixed scroll 6 to cancel the discharge noise of the discharged gas and the inside of the casing 1 Is discharged in combination with the discharge cover 7 for dividing the discharge into the suction space S1 and the discharge space S2 and the rear surface of the hard plate portion of the fixed scroll 6. The assembly includes a non-return valve (8) to prevent backflow.
선회스크롤(5)과 고정스크롤(6)에는 서로 맞물리면서 복수 개의 압축실(P)을 쌍으로 형성하는 랩(5a)(6a)을 각각 인벌류트 형상으로 형성하고, 이들 랩(5a)(6a)의 선단면에는 압축가스가 누설을 방지하는 팁실부재(5b)(6b)를 상하 이동 가능하도록 삽입 결합하고 있다.In the swinging scroll 5 and the fixed scroll 6, the wraps 5a and 6a which form a plurality of compression chambers P in pairs with each other are formed in an involute shape, and the wraps 5a and 6a are respectively formed. A tip seal member (5b) (6b) is inserted and coupled to the tip end surface of the tip chamber member (5b) and (6b) to prevent leakage of compressed gas.
또, 양쪽 스크롤(5)(6) 중에서 고정스크롤(6)의 최외곽 랩 바깥쪽에는 흡입구(6c)를 형성하고, 중앙부근에는 토출구(6d)를 형성하고 있다.Moreover, the inlet 6c is formed in the outermost wrap outer side of the fixed scroll 6 among the both scrolls 5 and 6, and the discharge port 6d is formed in the vicinity of the center.
도면중 미설명 부호인 3A는 고정자, 3B는 회전자, 9는 올담링이다.In the figure, reference numeral 3A denotes a stator, 3B denotes a rotor, and 9 denotes an old dam ring.
상기와 같은 종래의 스크롤 압축기는 다음과 같이 동작한다.The conventional scroll compressor as described above operates as follows.
즉, 인가한 전원에 의해 구동축(4)이 구동모터(3)와 함께 회전을 하면서 선회스크롤(5)이 편심거리 만큼 선회하고, 이와 함께 선회스크롤(5)은 고정스크롤(6)과의 랩부(5a)(6a) 사이에 압축실(P)을 복수 개 형성하며, 이 압축실(P)은 선회스크롤(5)의 지속적인 선회운동에 의해 중심으로 이동하면서 체적이 감소하여 냉매가스를 흡입 압축하여 토출하는 일련의 과정을 반복한다.That is, while the drive shaft 4 is rotated together with the drive motor 3 by the applied power source, the turning scroll 5 turns by an eccentric distance, and the turning scroll 5 is wrapped with the fixed scroll 6. A plurality of compression chambers (P) are formed between (5a) and (6a), and the compression chamber (P) is moved to the center by the continuous turning movement of the turning scroll (5), and the volume decreases to suck and compress the refrigerant gas. The process of discharging is repeated.
이를 보다 상세히 살펴보면, 압축기가 정상적으로 운전을 하는 중에는 냉매가스가 가스흡입관(SP)을 통해 케이싱(1)의 내부로 흡입되고, 이 흡입된 냉매가스는 고정스크롤(6)의 흡입구(6c)를 통해 최외곽 압축실(P)로 유입되었다가 점차 안쪽의 최종 압축실(P)쪽으로 이동하면서 압축되며, 이후 고정스크롤(6)의 토출구(6d)를 통해 토출커버(7)의 토출공간(S2)으로 토출되었다가 가스토출관(DP)을 거쳐 냉동사이클장치의 응축기로 토출되는 것이었다.In more detail, during the normal operation of the compressor, the refrigerant gas is sucked into the casing 1 through the gas suction pipe SP, and the sucked refrigerant gas is sucked through the suction port 6c of the fixed scroll 6. It flows into the outermost compression chamber P and gradually moves to the inner final compression chamber P, and is compressed. Then, the discharge space S2 of the discharge cover 7 is discharged through the discharge port 6d of the fixed scroll 6. Discharged to the condenser of the refrigeration cycle apparatus via the gas discharge pipe (DP).
그러나, 상기와 같은 종래 스크롤 압축기에 있어서는, 압축기의 용량을 가변하기 위하여는 주로 회전수를 제어하는 전기적인 방식을 사용하고 있으나, 이는 회전수를 제어하는 방식은 성능은 우수한 반면 고가의 제어기를 구비하여야 하므로 압축기의 가격이 상승할 뿐만 아니라 낮은 회전수에서 급유가 원활하지 못하고 반대로 높은 회전수에서는 마찰로 인해 신뢰성이 저하되는 문제점이 있었다.However, in the conventional scroll compressor as described above, in order to vary the capacity of the compressor is mainly used an electrical method to control the rotation speed, which is a method of controlling the rotation speed is excellent in performance but has an expensive controller Since the price of the compressor not only increases, but the oil supply is not smooth at low rpm, on the contrary, there is a problem that the reliability is lowered due to friction at high rpm.
본 발명은 상기와 같은 종래 스크롤 압축기의 용량 가변 장치가 가지는 문제점을 감안하여 안출한 것으로, 비용이 저렴하면서도 용량을 효과적으로 가변시킬 수 있는 스크롤 압축기의 용량 가변 장치를 제공하려는데 본 발명의 목적이 있다. The present invention has been made in view of the problems of the conventional variable capacity of the scroll compressor as described above, it is an object of the present invention to provide a variable capacity of the scroll compressor that can effectively vary the capacity while the cost is low.
본 발명의 목적을 달성하기 위하여, 구동모터의 회전자에 회전축으로 편심 결합하여 선회운동을 하는 선회스크롤과, 선회스크롤의 랩과 맞물려 연속으로 이동하는 압축실을 형성하도록 랩을 구비하고 흡입압축실에 연통하는 제1 바이패스구멍과 중간압축실에 연통하는 제2 바이패스구멍을 형성하며 제1 바이패스구멍과 제2 바이패스구멍을 서로 연통하도록 밸브구멍을 형성하는 고정스크롤과, 고정스크롤의 밸브구멍에 설치하여 상기한 제1 바이패스구멍과 제2 바이패스구멍을 선택적으로 연통시켜 압축시점을 가변하는 바이패스조절수단을 포함한 것을 특징으로 하는 스크롤 압축기의 용량 가변 장치를 제공한다.In order to achieve the object of the present invention, a suction scroll chamber provided with a wrap to form a rotating scroll and eccentrically coupled to the rotor of the drive motor to the rotational movement, and a compression chamber that is continuously engaged with the wrap of the rotating scroll A fixed scroll configured to form a first bypass hole communicating with the second bypass hole communicating with the intermediate compression chamber, and a valve hole communicating the first bypass hole and the second bypass hole with each other; It is provided in the valve hole provides a variable capacity device of a scroll compressor comprising a bypass adjusting means for selectively communicating the first bypass hole and the second bypass hole to vary the compression time point.
이하, 본 발명에 의한 스크롤 압축기의 용량 가변 장치를 첨부도면에 도시한 일실시예에 의거하여 상세하게 설명한다.Hereinafter, a variable displacement device of a scroll compressor according to the present invention will be described in detail with reference to an embodiment shown in the accompanying drawings.
도 2는 본 발명 스크롤 압축기의 일례를 보인 종단면도이고, 도 3은 본 발명 용량 가변 장치의 요부를 보인 분해 사시도이며, 도 4는 본 발명 스크롤 압축기의 용량 가변 장치에서 고정스크롤을 보인 저면도이고, 도 5는 본 발명 스크롤 압축기의 정상운전상태를 보인 종단면도이며, 도 6은 본 발명 스크롤 압축기의 저용량운전상태를 보인 종단면도이고, 도 7은 본 발명 스크롤 압축기의 가변운전시 압력변화를 설명하기 위하여 보인 그래프이다.Figure 2 is a longitudinal sectional view showing an example of the scroll compressor of the present invention, Figure 3 is an exploded perspective view showing the main portion of the variable capacity device of the present invention, Figure 4 is a bottom view showing a fixed scroll in the variable capacity device of the scroll compressor of the present invention. 5 is a longitudinal sectional view showing a normal operation state of the scroll compressor of the present invention, Figure 6 is a longitudinal sectional view showing a low capacity operation state of the scroll compressor of the present invention, Figure 7 illustrates the pressure change during variable operation of the scroll compressor of the present invention It is a graph shown to do.
이에 도시한 바와 같이 본 발명에 의한 스크롤 압축기는, 가스흡입관(SP)과 가스토출관(DP)을 구비한 케이싱(1)과, 케이싱(1)의 내주면 상하 양측에 각각 고정하는 메인프레임(2) 및 서브프레임(미도시)과, 메인프레임(2)과 서브프레임(미도시) 사이에 장착하는 구동모터(3)와, 구동모터(3)의 중심에 압입하고 메인프레임(2)을 관통하여 구동모터(3)의 회전력을 전달하는 구동축(4)과, 구동축(4)에 결합하여 메인프레임(2)의 상면에 얹히는 선회스크롤(5)과, 선회스크롤(5)에 결합하여 복수 개의 압축실(P1)(P2)(P3)을 형성하도록 메인프레임(2)의 상면에 고정하는 고정스크롤(6)과, 고정스크롤(6)의 토출구(6d)를 수용하여 배면에 밀봉 결합하고 소정의 토출공간(S2)을 형성하여 상기한 가스토출관(DP)을 연통하는 토출커버(7)와, 토출커버(7)의 내부에서 상기 고정스크롤(6)의 배면에 결합하여 흡입압축실(P1)과 중간압축실(P2)을 선택적으로 연통하는 바이패스조절부(10)를 포함한다.As shown in the drawing, the scroll compressor according to the present invention includes a casing 1 having a gas suction pipe SP and a gas discharge pipe DP, and a main frame 2 fixed to upper and lower sides of the inner circumferential surface of the casing 1, respectively. ) And a subframe (not shown), a drive motor (3) mounted between the mainframe (2) and a subframe (not shown), and press-fits into the center of the drive motor (3) and penetrates the mainframe (2). Drive shaft (4) for transmitting the rotational force of the drive motor (3), the turning scroll (5), which is coupled to the driving shaft (4) and placed on the upper surface of the main frame (2), and the turning scroll (5) A fixed scroll (6) fixed to the upper surface of the main frame (2) to form two compression chambers (P1) (P2) and (P3), and a discharge port (6d) of the fixed scroll (6) to be sealed and coupled to the rear surface The discharge cover 7 which forms a predetermined discharge space S2 and communicates the gas discharge pipe DP with the fixed scroll 6 inside the discharge cover 7. It is coupled to the back includes a bypass control unit 10 for selectively communicating with the suction compression chamber (P1) and the intermediate compression chamber (P2).
고정스크롤(6)은 도 4에서와 같이 선회스크롤(5)의 랩(5a)과 맞물려 복수 개의 압축실(P)을 형성하도록 인벌류트 형상으로 랩(6a)을 형성하고, 그 랩(5a)(6a)의 바깥쪽에는 흡입구(6c)를 형성하는 반면 랩(6a)의 중앙에는 상기한 토출구(6d)를 형성한다. 또, 흡입구(6c)에 연통하는 흡입압축실(P1)에는 고정스크롤(6)의 배면으로 제1 바이패스구멍(6e)을 형성하고, 흡입압축실(P1)에 연속하는 중간압축실(P2)에는 고정스크롤(6)의 배면으로 상기한 제1 바이패스구멍(6e)과 독립된 제2 바이패스구멍(6f)을 형성한다. 또, 제1 바이패스구멍(6e)과 제2 바이패스구멍(6f)의 끝단에는 두 바이패스구멍(6e)(6f)을 연통하도록 밸브구멍(6g)을 형성한다.The fixed scroll 6 forms a wrap 6a in an involute shape so as to engage with the wrap 5a of the swinging scroll 5 to form a plurality of compression chambers P as shown in FIG. 4, and the wrap 5a. The suction port 6c is formed outside the 6a, while the discharge port 6d is formed in the center of the wrap 6a. Further, in the suction compression chamber P1 communicating with the suction port 6c, a first bypass hole 6e is formed on the rear surface of the fixed scroll 6, and the intermediate compression chamber P2 continuous to the suction compression chamber P1. The second bypass hole 6f, which is independent of the first bypass hole 6e described above, is formed on the rear surface of the fixed scroll 6). At the ends of the first bypass hole 6e and the second bypass hole 6f, a valve hole 6g is formed so as to communicate two bypass holes 6e and 6f.
밸브구멍(6g)은 상기한 토출커버(7)의 내부에 수용되는 위치에서 후술할 피스톤밸브(11)가 닫힐 때 신속하게 닫히도록 축방향으로 형성하되 그 밸브구멍(6g)의 상단에는 후술할 솔레노이드(12)가 안착되도록 솔레노이드안착홈(6h)을 확장 단차지게 형성하는 것이 바람직하다.The valve hole 6g is formed in the axial direction so as to be closed quickly when the piston valve 11 to be described later is closed at a position accommodated in the discharge cover 7, but the upper end of the valve hole 6g will be described later. It is preferable to form the solenoid seating groove 6h in an extended step so that the solenoid 12 is seated.
바이패스조절부(10)는 상기한 제1 바이패스구멍(6e)과 제2 바이패스구멍(6f)을 함께 개폐하는 피스톤밸브(11)와, 피스톤밸브(11)의 압축배면에 설치하여 필요시 인가된 전원에 의해 자력을 발생하면서 상기 피스톤밸브(11)를 당겨 상기한 두 바이패스구멍(6e)(6f)이 열리도록 하는 솔레노이드(12)와, 피스톤밸브(11)와 솔레노이드(12) 사이에 개재하여 전원 오프시 복원되면서 상기한 피스톤밸브(11)가 두 바이패스구멍(6e)(6f)을 닫도록 하는 압축스프링(13)으로 이루어진다.The bypass adjusting section 10 is provided on the piston valve 11 for opening and closing the first bypass hole 6e and the second bypass hole 6f together, and on the compression back surface of the piston valve 11. The solenoid 12 which opens the two bypass holes 6e and 6f by pulling the piston valve 11 while generating magnetic force by the power applied to the engine, the piston valve 11 and the solenoid 12. The piston valve 11 is composed of a compression spring 13 which closes the two bypass holes 6e and 6f while being restored when the power is turned off.
피스톤밸브(11)는 원봉모양의 자성체로 형성하여 그 압축배면의 중앙에 후술할 솔레노이드(12)에 신속하게 반응하도록 자력돌기(11a)를 형성하고, 자력돌기(11a)의 주변에는 상기한 압축스프링(13)을 끼워 고정하는 고정돌기(11b)를 형성한다.The piston valve 11 is formed of a rod-shaped magnetic material and forms a magnetic protrusion 11a at the center of the compression back thereof so as to react quickly to the solenoid 12, which will be described later, and the aforementioned compression around the magnetic protrusion 11a. A fixing protrusion 11b for sandwiching and fixing the spring 13 is formed.
솔레노이드(12)는 고정스크롤(6)의 솔레노이드안착홈(6h)에 얹어 고정하고, 그 배면은 별도의 고정판(14)을 압입하여 빠지지 않도록 견고하게 고정한다.Solenoid 12 is fixed to the solenoid seating groove (6h) of the fixed scroll (6), the back of the fixed fixing plate 14 is firmly fixed so as not to be pushed out.
압축스프링(13)은 솔레노이드(12)가 동작하면 피스톤밸브(11)가 신속하게 열릴 수 있는 탄성계수를 가진 압축코일스프링으로 이루어져 하단은 상기한 피스톤밸브(11)의 고정돌기(11b)에 끼워 고정하는 반면 상단은 솔레노이드(12)의 저면에 밀착 고정한다.The compression spring 13 is composed of a compression coil spring having an elastic modulus that allows the piston valve 11 to be opened quickly when the solenoid 12 operates, and the lower end of the compression spring 13 is inserted into the fixing protrusion 11b of the piston valve 11. While fixing the top is tightly fixed to the bottom of the solenoid (12).
한편, 도면으로 도시하지는 않았으나 피스톤밸브(11)는 별도의 고정돌기(11b)를 형성하지 않고 압축스프링(13)을 피스톤밸브(11)의 자력돌기(11a)에 끼워 고정할 수도 있다.On the other hand, although not shown in the drawings, the piston valve 11 may be fixed by fitting the compression spring 13 to the magnetic projection (11a) of the piston valve 11 without forming a separate fixing projection (11b).
도면중 종래와 동일한 부분에 대하여는 동일한 부호를 부여하였다.In the drawings, the same reference numerals are given to the same parts as in the prior art.
도면중 미설명 부호인 3A는 고정자, 3B는 회전자, 5b는 팁실부재, 6b는 팁실부재, 8은 역지밸브조립체, 9는 올담링, P3는 토출압축실, S1은 흡입공간, S2는 토출공간, W는 전원이다.3A is a stator, 3B is a rotor, 5b is a tip seal member, 6b is a tip seal member, 8 is a check valve assembly, 9 is an old dam ring, P3 is a discharge compression chamber, S1 is a suction space, and S2 is a discharge Space, W is the power source.
상기와 같은 본 발명 스크롤 압축기의 용량 가변 장치는 다음과 같은 작용 효과를 갖는다.The variable capacity device of the scroll compressor of the present invention as described above has the following effects.
즉, 인가한 전원에 의해 구동축(4)이 구동모터(3)와 함께 회전을 하면서 선회스크롤(5)이 편심거리 만큼 선회하고, 이와 함께 선회스크롤(5)과 고정스크롤(6)의 랩(5a)(6a) 사이에는 복수 개의 압축실(P1)(P2)(P3)을 쌍으로 형성하며, 이 압축실(P1)(P2)(P3)은 선회스크롤(5)의 지속적인 선회운동에 의해 중심으로 이동하면서 체적이 감소하여 냉매가스를 흡입 압축하여 토출하는 일련의 과정을 반복한다.That is, while the drive shaft 4 rotates together with the drive motor 3 by the applied power source, the turning scroll 5 rotates by an eccentric distance, and together with the wrap of the turning scroll 5 and the fixed scroll 6 A plurality of compression chambers P1, P2, and P3 are formed in pairs between 5a and 6a, and the compression chambers P1, P2 and P3 are formed by continuous turning movement of the turning scroll 5, respectively. As the volume moves to the center, the volume decreases and a series of processes of inhaling, compressing, and discharging the refrigerant gas are repeated.
여기서, 압축기가 정상적으로 운전을 할 때에는 도 5에서와 같이 솔레노이드(12)에 전원이 인가되지 않아 솔레노이드(12)가 자력을 띠지 않게 되고, 이에 따라 피스톤밸브(11)는 자체 하중과 압축스프링(13)의 탄성력에 의해 하강하여 틈새(t)를 거의 없앰에 따라 제1 바이패스구멍(6e)과 제2 바이패스구멍(6f)을 차단한 상태를 유지하게 된다. 이때, 냉매가스는 고정스크롤(6)의 흡입구(6c)를 통해 흡입압축실(P1)로 흡입되어 중간압축실(P2)로 이동하면서 도 7의 A지점과 B지점, 즉 흡입구(6c)를 기준으로 대략 360°되는 지점(한 쪽 압축실의 경우)과 대략 540°되는 지점(맞은편 압축실의 경우)부터 압축을 시작하여 토출압축실(P3)로 각각 이동하였다가 토출구(6d)를 통해 토출된다.In this case, when the compressor operates normally, power is not applied to the solenoid 12 as shown in FIG. 5, so that the solenoid 12 does not become magnetic. Accordingly, the piston valve 11 has its own load and the compression spring 13. The first bypass hole 6e and the second bypass hole 6f are kept in a closed state by lowering the gap t by the elastic force of the force. At this time, the refrigerant gas is sucked into the suction compression chamber (P1) through the suction port (6c) of the fixed scroll (6) and moved to the intermediate compression chamber (P2) while the point A and B, that is, the suction port (6c) of FIG. As a reference, compression starts from the point of approximately 360 ° (for one compression chamber) and the point of approximately 540 ° (for the opposite compression chamber), and then moves to the discharge compression chamber P3, respectively. Discharged through.
한편, 압축기가 저용량 운전을 할 때에는 도 6에서와 같이 솔레노이드(12)에 전원이 인가되어 솔레노이드(12)가 자력을 띠게 되고, 이에 따라 피스톤밸브(11)는 솔레노이드(12)의 자력에 의해 자체 하중과 압축스프링(13)의 탄성력을 이기면서 상승하여 틈새(t)가 발생하고 이 틈새(t)를 통해 제1 바이패스구멍(6e)과 제2 바이패스구멍(6f)을 연통시키게 된다. 이때, 고정스크롤(6)의 흡입구(6c)를 통해 흡입압축실(P1)로 흡입되어 중간압축실(P2)로 이동하던 냉매가스가 상기한 제2 바이패스구멍(6f)을 통해 밸브구멍(6g)으로 누설되었다가 다시 제1 바이패스구멍(6e)을 통해 흡입압축실(P1)로 유입되어 결국 중간압축실(P2)이 실질적으로는 흡입압축실(P1)의 역할을 함에 따라 압축개시시점이 도 7의 A'지점과 B'지점, 즉 흡입구(6c)를 기준으로 대략 720°되는 지점(한 쪽 압축실의 경우)과 대략 900°되는 지점(맞은편 압축실의 경우)으로 이동하게 된다. 이로 인해 실질적인 압축실의 체적이 좁아져 압축기의 용량을 낮출 수 있는 것이다. On the other hand, when the compressor is low-capacity operation, as shown in FIG. 6, power is applied to the solenoid 12, so that the solenoid 12 is magnetically energized. As a result, the piston valve 11 is driven by the magnetic force of the solenoid 12. The gap (t) is generated by rising while overcoming the load and the elastic force of the compression spring (13) to communicate the first bypass hole (6e) and the second bypass hole (6f) through the gap (t). At this time, the refrigerant gas sucked into the suction compression chamber P1 through the suction port 6c of the fixed scroll 6 and moved to the intermediate compression chamber P2 passes through the second bypass hole 6f. 6g) leaks to the suction compression chamber P1 through the first bypass hole 6e, and finally the compression starts as the intermediate compression chamber P2 substantially serves as the suction compression chamber P1. The point of view moves to points A 'and B' of FIG. 7, that is, approximately 720 ° (for one compression chamber) and approximately 900 ° (for opposite compression chamber) relative to the inlet 6c. Done. As a result, the actual volume of the compression chamber is narrowed, which can lower the capacity of the compressor.
본 발명에 의한 스크롤 압축기의 용량 가변 장치는, 중간압축실과 흡입압축실을 선택적으로 연통할 수 있도록 하여 압축개시시점을 늦춤으로써, 선회스크롤의 회전수를 가변하거나 배관을 복잡하게 연결하지 않고도 압축가스의 토출량을 줄일 수 있어 저렴하면서도 신속하게 저용량 가변형의 스크롤 압축기를 구현할 수 있다.The variable capacity apparatus of the scroll compressor according to the present invention allows the intermediate compression chamber and the suction compression chamber to be selectively communicated, thereby delaying the compression start point, thereby making it possible to change the number of revolutions of the turning scroll or to connect the piping without complicated piping. It is possible to reduce the discharge amount of the low cost and can implement a scroll compressor of low capacity variable type quickly.
도 1은 종래 스크롤 압축기의 일부를 보인 종단면도,1 is a longitudinal sectional view showing a part of a conventional scroll compressor;
도 2는 본 발명 스크롤 압축기의 일례를 보인 종단면도,2 is a longitudinal sectional view showing an example of the scroll compressor of the present invention;
도 3은 본 발명 용량 가변 장치의 요부를 보인 분해 사시도,Figure 3 is an exploded perspective view showing the main part of the present invention variable capacity device,
도 4는 본 발명 스크롤 압축기의 용량 가변 장치에서 고정스크롤을 보인 저면도,Figure 4 is a bottom view showing a fixed scroll in the variable capacity device of the scroll compressor of the present invention,
도 5는 본 발명 스크롤 압축기의 정상운전상태를 보인 종단면도,5 is a longitudinal sectional view showing a normal operation state of the scroll compressor of the present invention;
도 6은 본 발명 스크롤 압축기의 저용량운전상태를 보인 종단면도,Figure 6 is a longitudinal sectional view showing a low capacity operation state of the scroll compressor of the present invention,
도 7은 본 발명 스크롤 압축기의 가변운전시 압력변화를 설명하기 위하여 보인 그래프.Figure 7 is a graph shown to explain the pressure change during variable operation of the scroll compressor of the present invention.
** 도면의 주요 부분에 대한 부호의 설명 **** Description of symbols for the main parts of the drawing **
1 : 케이싱 5 : 선회스크롤1: casing 5: turning scroll
6 : 고정스크롤 6c : 흡입구6: fixed scroll 6c: inlet
6d : 토출구 6e : 제1 바이패스구멍6d: discharge port 6e: first bypass hole
6f : 제2 바이패스구멍 6g : 밸브구멍6f: 2nd bypass hole 6g: valve hole
6h : 솔레노이드안착면 10 : 바이패스조절부6h: solenoid seating surface 10: bypass control unit
11 : 피스톤밸브 11a : 자력돌기11: piston valve 11a: magnetic projection
11b : 고정돌기 12 : 솔레노이드11b: fixed protrusion 12: solenoid
13 : 압축스프링 14 : 고정판13: compression spring 14: fixed plate
P1,P2,P3 : 흡입,중간,토출압축실P1, P2, P3: suction, middle, discharge chamber
Claims (5)
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| Application Number | Priority Date | Filing Date | Title |
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| KR1020040020502A KR100608664B1 (en) | 2004-03-25 | 2004-03-25 | Capacity changeable apparatus for scroll compressor |
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| Application Number | Priority Date | Filing Date | Title |
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| KR1020040020502A KR100608664B1 (en) | 2004-03-25 | 2004-03-25 | Capacity changeable apparatus for scroll compressor |
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| KR20050095246A true KR20050095246A (en) | 2005-09-29 |
| KR100608664B1 KR100608664B1 (en) | 2006-08-08 |
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| KR1020040020502A KR100608664B1 (en) | 2004-03-25 | 2004-03-25 | Capacity changeable apparatus for scroll compressor |
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| KR100916229B1 (en) * | 2008-01-31 | 2009-09-08 | 엘지전자 주식회사 | Apparatus for changing mode in scroll compressor |
| KR100920980B1 (en) * | 2008-02-19 | 2009-10-09 | 엘지전자 주식회사 | Capacity varying device for scroll compressor |
| WO2014085157A1 (en) * | 2012-11-30 | 2014-06-05 | Emerson Climate Technologies, Inc. | Scroll compressor with variable volume ratio port in orbiting scroll |
| US9127677B2 (en) | 2012-11-30 | 2015-09-08 | Emerson Climate Technologies, Inc. | Compressor with capacity modulation and variable volume ratio |
| US9249802B2 (en) | 2012-11-15 | 2016-02-02 | Emerson Climate Technologies, Inc. | Compressor |
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| US20150004039A1 (en) * | 2013-06-28 | 2015-01-01 | Emerson Climate Technologies, Inc. | Capacity-modulated scroll compressor |
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- 2004-03-25 KR KR1020040020502A patent/KR100608664B1/en active IP Right Grant
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